Deep Soil Mixing Ltd has undertaken both column and mass mixing using their double rotary mixing head designed by Deep Soil Mixing Ltd Director Robert McGall, installing soil mixed columns to a depth of up to 10 metres as well as a soil mixed mattress across the whole of the site covering an area of just under 11,000m2.
The company has also used the cutter soil mixer on this project to install 200 soil mixed panels. The Cutter Soil Mixer was specifically used on the St Mary’s Bay project to overcome some isolated areas of very stiff layers of clay which had softer soils below so it was necessary to mix through the clay into the soils below to enable remediation to take place.
In response to a foundation enquiry from the consulting engineers Considine Ltd, Deep Soil Mixing Ltd put forward various options that soil mixing could provide to deliver a design solution that saved the client time and reduced cost comparable to alternative ground engineering solutions.
Roland Cooper Chartered Civil Engineer and Director of Considine Ltd commented: “These works are shaving more than 18 months off of the programme for a conventional ‘load and settle’ solution as well as providing improved stability behind coastal defences. We do like an innovative solution here at Considine!”
Deep Soil Mixing Ltd always advise getting involved with clients and their designers as early as possible in their development process to create engineered solutions that offer real cost savings for projects including real benefits such as reduced vehicle movements and the efficient use of on site materials on their projects, which reduces the carbon footprint and offers environmentally friendly sustainable solutions.
Soil mixing was specified for use on this residential site to eliminate the differential settlement across the site. The alternative solution was to either pile the buildings which would have created huge conflicts in differential settlement or to remove soil from the site and take to landfill which again was not a cost effective or environmentally friendly solution. Soil mixing is also quieter than piling and has zero vibration which meant there was no impact on the surrounding residents.